Feem ntau hais lus, txhawm rau kom tau txais cov khoom siv kho tshuab siab dua, yuav tsum xaiv qhov kub ntawm extrusion ntau dua. Txawm li cas los xij, rau 6063 alloy, thaum qhov dav dav extrusion kub siab dua 540 ° C, cov khoom siv ntawm cov profile yuav tsis nce ntxiv, thiab thaum nws qis dua 480 ° C, lub zog tensile yuav tsis tsim nyog.
Yog hais tias qhov kub ntawm extrusion siab dhau lawm, npuas, tawg, thiab nto khawb thiab txawm tias burrs yuav tshwm sim ntawm cov khoom vim aluminium sticking rau pwm. Yog li ntawd, txhawm rau kom tau txais cov khoom lag luam nrog cov khoom zoo, feem ntau siv cov extrusion kub.
Cov cuab yeej zoo kuj yog lub ntsiab lus tseem ceeb los txhim kho kev tsim khoom ntawm aluminium extrusion, tshwj xeeb tshaj yog peb qhov loj ntawm aluminium extruder, aluminium pas nrig cua sov rauv, thiab pwm cua sov rauv. Tsis tas li ntawd, qhov tseem ceeb tshaj plaws yog kom muaj tus neeg teb xov tooj extrusion zoo heev.
Kev ntsuas cua sov
Aluminium bars thiab rods yuav tsum tau pre-rhuab ua ntej extrusion kom ncav cuag ib tug kub nyob ze ntawm lub solvus kub, thiaj li hais tias cov magnesium nyob rau hauv lub txhuas pas nrig yuav yaj thiab ntws tusyees nyob rau hauv cov khoom txhuas. Thaum lub txhuas pas nrig muab tso rau hauv lub extruder, qhov kub thiab txias tsis hloov ntau.
Thaum lub extruder pib, lub zog thawb loj ntawm lub extruding pas nrig thawb cov khoom siv aluminium softened tawm ntawm lub qhov tuag, uas ua rau muaj kev sib txhuam ntau heev, uas yog hloov mus rau hauv qhov kub thiab txias, kom qhov kub ntawm qhov extruded profile tshaj qhov kub thiab txias. Lub sijhawm no, magnesium melts thiab ntws ncig, uas tsis ruaj khov heev.
Thaum qhov kub thiab txias, nws yuav tsum tsis txhob siab tshaj qhov kub thiab txias, txwv tsis pub cov txhuas kuj yuav yaj, thiab qhov profile tsis tuaj yeem tsim. Noj 6000 series alloy ua piv txwv, aluminium pas nrig kub yuav tsum khaws cia ntawm 400-540 ° C, nyiam dua 470-500 ° C.
Yog tias qhov kub thiab txias dhau lawm, nws yuav ua rau kua muag, yog tias nws qis dhau, qhov ceev ntawm extrusion yuav raug txo, thiab feem ntau ntawm cov kev sib txhuam tsim los ntawm extrusion yuav hloov mus rau hauv cov cua sov, ua rau qhov kub thiab txias. Qhov kub nce yog proportional rau lub extrusion ceev thiab extrusion siab.
Lub qhov hluav taws xob kub yuav tsum tau khaws cia ntawm 550-575 ° C, tsawg kawg yog siab dua 500-530 ° C, txwv tsis pub magnesium hauv aluminium alloy tsis tuaj yeem yaj thiab cuam tshuam rau cov khoom hlau. Tab sis nws yuav tsum tsis txhob siab tshaj qhov kub thiab txias, qhov kub ntawm qhov hluav taws xob ntau dhau yuav ua rau tawg thiab cuam tshuam rau qhov zoo ntawm qhov profile.
Qhov zoo tshaj plaws extrusion kub ntawm lub txhuas pas nrig yuav tsum tau kho nyob rau hauv ua ke nrog nrog lub extrusion ceev kom lub extrusion kub txawv tsis qis dua lub solvus kub thiab tsis siab tshaj lub solidus kub. Cov alloys sib txawv muaj qhov sib txawv solvus kub. Piv txwv li, solvus kub ntawm 6063 alloy yog 498 ° C, thaum lub 6005 alloy yog 510 ° C.
Tsheb laij teb ceev
Tsheb laij teb ceev yog ib qho tseem ceeb qhia txog kev tsim khoom. Txawm li cas los xij, cov profiles sib txawv, cov duab, cov alloys, qhov ntau thiab tsawg, thiab lwm yam yuav cuam tshuam rau kev ceev ntawm lub tsheb laij teb, uas tsis tuaj yeem hais dav dav. Niaj hnub nimno western extrusion profile factories tuaj yeem ua tiav lub tsheb laij teb ceev ntawm 80 meters ib feeb.
Extrusion pas nrig tus nqi yog lwm qhov tseem ceeb qhia txog kev tsim khoom. Nws yog ntsuas nyob rau hauv millimeters ib feeb thiab extrusion pas nrig ceev yog feem ntau txhim khu kev qha tshaj lub tsheb laij teb ceev thaum kawm ntau lawm efficiency.
Pwm kub tseem ceeb heev rau qhov zoo ntawm extruded profiles. Pwm kub yuav tsum tau khaws cia ntawm li 426 ° C ua ntej extrusion, txwv tsis pub nws yuav yooj yim clog los yog ua rau cov pwm puas. Lub hom phiaj ntawm quenching yog "khov" cov hlau alloying magnesium, stabilizing cov magnesium atoms tsis ruaj khov thiab tiv thaiv lawv los ntawm kev daws teeb meem, txhawm rau tswj lub zog ntawm qhov profile.
Peb txoj kev quenching tseem ceeb muaj xws li: cua txias, dej pos huab cua txias, dej tank txias. Hom quenching siv nyob ntawm qhov ceev extrusion, thickness thiab cov khoom uas yuav tsum tau ntawm lub profile, tshwj xeeb tshaj yog cov yuav tsum tau muaj zog. Hom alloy yog ib qho qhia meej ntawm hardness thiab elastic zog ntawm cov hlau. Aluminium alloy hom tau teev nyob rau hauv kev nthuav dav los ntawm American Aluminium Association, thiab muaj tsib lub xeev:
F txhais tau tias "raws li fabricated".
O txhais tau tias "annealed wrought khoom".
T txhais tau hais tias nws tau "kho tau cua sov".
W txhais tau hais tias cov khoom tau raug kho cua sov.
H yog hais txog cov hlau tsis muaj cua sov uas yog "txias ua haujlwm" lossis "txhim tawv tawv".
Qhov kub thiab lub sijhawm yog ob qhov ntsuas uas xav tau kev tswj xyuas nruj ntawm kev laus. Hauv qhov cub hluav taws xob hluav taws xob, txhua qhov ntawm qhov kub yuav tsum yog tib yam. Txawm hais tias qhov kub tsis tshua muaj kev laus tuaj yeem txhim kho lub zog ntawm cov profiles, lub sij hawm xav tau yuav tsum tau nce ntxiv. Txhawm rau kom ua tiav cov khoom zoo tshaj plaws ntawm lub cev, nws yog ib qho tsim nyog los xaiv cov khoom tsim nyog aluminium alloy thiab nws daim ntawv pom zoo, siv hom quenching tsim nyog, tswj qhov tsim nyog qhov kub thiab txias lub sij hawm los txhim kho cov txiaj ntsig, qhov tawm los yog lwm qhov tseem ceeb ntawm kev tsim khoom. efficiency. Nws yog theoretically tsis yooj yim sua kom ua tiav 100% tawm los, vim hais tias lub pob tw yuav txiav tawm cov khoom vim lub pinch marks ntawm lub tsheb laij teb thiab stretchers.
Kho los ntawm May Jiang los ntawm MAT Aluminium
Post lub sij hawm: Jun-05-2023
